A Dual Active-Passive Coating with Intumescent and Fire-Retardant Properties Based on High Molecular Weight Tannins
| Autor: | Andrés Díaz-Gómez, A. F. Jaramillo, Eduardo Pérez-Tijerina, Manuel F. Meléndrez, María Elizabeth Berrio, Jesús Ramirez, D. Rojas, F. Solis-Pomar, Katherina Fernández |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Abrasion (mechanical) 020209 energy 02 engineering and technology engineering.material intumescent flame retardant fire-resistant coating tannin Metal Coating 0202 electrical engineering electronic engineering information engineering Materials Chemistry eco-friendly Tannin Composite material chemistry.chemical_classification Carbonization Surfaces and Interfaces 021001 nanoscience & nanotechnology Engineering (General). Civil engineering (General) Pinus radiata Surfaces Coatings and Films chemistry visual_art engineering visual_art.visual_art_medium TA1-2040 0210 nano-technology Layer (electronics) Intumescent Fire retardant |
| Zdroj: | Coatings, Vol 11, Iss 460, p 460 (2021) Coatings Volume 11 Issue 4 |
| ISSN: | 2079-6412 |
| Popis: | In this study, the tannins extracted from the Pinus radiata bark were used to develop an active–passive dual paint scheme with intumescent (IN) and fire-resistant (FR) behaviors. The properties of the coating were observed to depend on the concentration of high-molecular-weight tannins (H-MWT) incorporated into the formulation. At high concentrations (13% w/w), the coating exhibits fire-retardant properties due to the generation of a carbonaceous layer however, at low concentrations (2.5% w/w), it generates an intumescent effect due to the formation of a carbonaceous foam layer. The dual IN–FR scheme was evaluated against fire by flame advance tests, carbonization index, mass loss, and intumescent effect, and was also compared to a commercial coating. The dual scheme presented good mechanical properties with a pull-off adhesion value of 0.76 MPa and an abrasion index of 54.7% at 1000 cycles, when using a coating with a high solid content (> 60%) and the same thickness as those of the commercial coatings. The results of the fire resistance test indicate that the dual scheme generates a protective effect for wood and metal, with an excellent performance that is comparable to that of a commercial intumescent coating. |
| Databáze: | OpenAIRE |
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